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Development of Lidar wind measurement techniques · SWE (within LIDAR project) • Designed for...
Transcript of Development of Lidar wind measurement techniques · SWE (within LIDAR project) • Designed for...
Gefördert auf Grund eines Beschlusses des Deutschen Bundestages Projektträger Koordination
Development of Lidar wind measurement techniques
Andreas Rettenmeier
J. Anger , O. Bischoff , M. Hofsäß, D. Schlipf, I. Würth, P. W. Cheng
Stuttgart Wind Energy (SWE) - University of Stuttgart
RAVE 2012 Bremerhaven, 8.-9.5.2012
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Table of Contents
• Motivation
• The projects and their aims
• Project partners
• Lidar systems
• Ground-based measurements
• Nacelle-based measurements
• Conclusions & Outlook
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Turbine development & research
• Higher temporal and spatial resolution of the wind field
• Power curve determination over the swept rotor area
• Loads, wake from other turbines
• Control (fatigue and extreme loads)
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Motivation: Lidar technology The new quality in wind measurement
Site evaluation & wind potential analyses
• Onshore: „complex terrain“, forest
• Offshore
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
LIDAR II project (2010-2013)
- on-/offshore -
• Lidar assisted control tests for load
reduction and energy yield
optimization
• Prototype of a robust, nacelle-based
Lidar system, test in alpha ventus
• Methods of power performance
behaviour of turbines with nacelle-
based Lidar
LIDAR I project (2007-2010)
- onshore -
• Lidar measurements
ground- and nacelle-based
• Development of Lidar scanner
• Wake, p-v and control applications
OWEA project (2008-2011)
- offshore -
• 2 scanning Lidar devices offshore
• Nacelle-based Lidar measurements
• Comparison with FINO I data
The projects and their aims
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Project partners within LIDAR, LIDAR II & OWEA
Research Institutes
• Stuttgart Wind Energy (SWE) - Universität Stuttgart
• ForWind - Carl von Ossietzky Universität
• DLR: Institute of Atmospheric Physics
Measurement Institutes
• DEWI GmbH: German Wind Energy Institute
• Germanischer Lloyd Garrad Hassan
Wind turbine manufacturer
• AREVA Wind GmbH
• REpower Systems SE
Dissemination
• FGW e.V.: German Federation of Windpower
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Ground-based Lidar measurements
SWE – Stuttgart Windenergie, Universität Stuttgart
ForWind – Universität Oldenburg
DLR- Deutsches Zentrum für Luft- und Raumfahrttechnik e.V.
DEWI GmbH
AREVA Wind GmbH
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Lidar Systems
Windcube™ system from
Leosphere ™ DLR long-range Lidar
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• Range 500 m - 10 km • Wavelength: 2.022 µm • Pulse length: 75 m • Pulse energy: 1.5 mJ
• Range 40m – 220m • Wavelength: 1,54 µm • Pulse length: 26m • Pulse energy: 10µJ
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LR
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Lidar-Test in Bremerhaven and at FINO 1
• Location: FINO1 platform
• Period: August 2009 - July 2010
• up to 44.190 10-min. data sets
• Resolution:
• 10-min
• 10 Hz (0.1 s) [FINO1]
• ~0.83 Hz (1.2 s) [LIDAR]
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AREVA Wind GmbH
M5000 prototype
• Rated power: 5 MW
• 116 m rotor diameter
• 102 m hub height
Measurement project
• April 2008 – March 2010
• Power curve and load measurement
• Met mast (102 m height)
• Meteorological sensors
• Data acquisition system
• Lidar device (ground, nacelle)
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
DLR long-range Lidar Measurements
• Results of elevation scans • 3km measurement range • Low-Level-Jet determination
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[Fig
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LR
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Nacelle-based Lidar measurements
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SWE – Stuttgart Windenergie, Universität Stuttgart
ForWind – Universität Oldenburg
DEWI GmbH
Germanischer Lloyd – Garrad Hassan
AREVA Wind GmbH
REpower Systems SE
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Motivation
Reasons for developing nacelle-based Lidar measurement techniques
• Increasing hub heights and rotor diameter of wind turbines
• Cost expansive certification procedures
• For on- and offshore purposes
Nacelle-based Lidar wind field measurements taking into account
• Whole swept rotor disc
• Wind direction (slow variation) yaw correction
• Horizontal wind shear, vertical wind shear (fast variation)
• More free valid measurement areas (acc. IEC 61400-12-1) Less sectors to exclude Faster measurement campaigns (on- and offshore)
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Measuring the incoming wind for
• Wind turbine certification
• Power performance testing
• Load validation
• Predictive control strategies
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Measuring the turbines wake wind for
• Validation of wake models
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Development of a Lidar Scanner
• Scanner and control software developed by SWE (within LIDAR project)
• Designed for nacelle-based applications • Adapted to Windcube by AventLidar
Technology • Allows steering the laser beam in any
direction • Proof-of- concept demonstrated in various
measurement campaigns on- and offshore (Bremerhaven, Risø-DTU, NREL, alpha-ventus)
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Development of a robust Lidar
• Under development, by Forwind-Oldenburg (within LIDAR II project)
• Designed for nacelle-based applications • Proof-of- concept demonstration onshore and offshore at
alpha ventus (planned)
[Fig
. Fo
rwin
d-O
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Experiment setup - Bremerhaven
LIDAR system installed on the nacelle (May 2009-March 2010) [F
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Lidar scanner
Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
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REpower 5M & AREVA Wind M5000 – inflow and wake
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Power curve determination and Statistical Load Estimation
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
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Results of nacelle-based near wake measurements (AREVA M5000, AV7, alpha ventus)
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Conclusions & Outlook
• Development of a scanning Lidar system
• Development of wind turbine applications using a Lidar for
• power curve determination (ground- and nacelle-based)
• wind turbine control (predictive control strategies)
• wake wind field analysis (wake modelling and measurement)
• Offshore test of Lidar device on FINO 1
• Lidar measurements on two offshore wind turbines in “alpha ventus”,
• Further development and test of robust Lidar device
• Proof-of-concept of predictive control
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Rettenmeier et al. Development of LIDAR wind measurement techniques Rave International Conference 2012
Session 5: Wind turbine control and wind farm flow 5.1 Lidar-assisted wind turbine control Project: RAVE - LIDAR, RAVE - LIDAR II D. Schlipf et al., Stuttgart Wind Energy (SWE), University of Stuttgart 5.5 Analysis of wake-induced wind turbine loads Project: RAVE - OWEA J.J. Trujillo, B. Kuhnle, H. Beck, ForWind - University of Oldenburg Session 6: Site conditions 6.4 Statistics of extreme wind events and power curve monitoring Project: RAVE - LIDAR, RAVE - OWEA Dr. M. Wächter, ForWind - University of Oldenburg
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Thank you for your attention!
Feel invited for further presentations on Lidar technology